<template>
  <view class="cart">
    <!-- 1 列表 -->
    <view class="cart-list">
      <view class="cart-item"  
       v-for="item in cartList" :key="item.goods_id">
        <!-- 1 复选框 -->
        <view class="goods-chk">
          <u-checkbox  
          :value="item.checked" 
          shape="circle" 
          active-color="red" 
          @change="handleToggleCheck(item.goods_id)"
          ></u-checkbox>
        </view>
        <!-- 2 图片 -->
        <view class="goods-img">
          <u-image width="191rpx" height="191rpx" :src="item.goods_small_logo"></u-image>
        </view>
        <!-- 3 信息 -->
        <view class="goods-info">
          <!-- 名称 -->
          <view class="goods-name u-line-2">{{item.goods_name}}</view>
          <!-- 价格和数量 -->
          <view class="goods-price-num">
            <view class="goods-price">￥{{item.goods_price}}</view>
            <view class="goods-num-tool">
              <view class="num-btn" @click="handleCartNumUpdate(-1,item.goods_id,item.num)">-</view>
              <view class="goods-num">{{item.num}}</view>
              <view class="num-btn"  @click="handleCartNumUpdate(+1,item.goods_id,item.num)">+</view>
            </view>
          </view>
        </view>
      </view>
    </view>
    <!-- 2 统计 -->
    <view class="statistics">
      <view class="all-chk">
        <u-checkbox 
        shape="circle" 
        active-color="red"
         :value="isAllChecked"
         @change="handleAllCheck"
        >全选</u-checkbox>
      </view>
      <view class="all-price"> 合计: <text>￥{{totalPrice}}</text> </view>
      <view class="all-count">
        <u-button type="error" shape="circle" @click="handleGoPay">去结算({{totalCount}})</u-button>
      </view>
    </view>
  </view>
</template>

<script>
import {mapState, mapGetters,mapMutations } from "vuex";
export default {
  computed: {
    // vuex中购物车数据
    ...mapState("cart", ["cartList"]),
    ...mapGetters('cart',["isAllChecked","totalCount","totalPrice"])
  },
  onLoad(){
    console.log(this.cartList);
  },
  methods:{
    ...mapMutations('cart',["cartToggleCheck","CartNumUpdate","cartItemDelete","cartAllToggle"]),
    handleToggleCheck(goods_id){
      console.log(goods_id);
      this.cartToggleCheck({value:goods_id})
    },
    async  handleCartNumUpdate(unit,goods_id,num){
  
       if(unit===-1&&num===1){
         const  [err,result] =  await uni.showModal({
          title: "提示",
          content: "您是否确认删除",
         })

         if(err){
           console.log(err);
           return err
         }
     
        if(result.confirm){
          console.log("执行删除");
          this.cartItemDelete({value:goods_id})
        }
       }else{
        // ! unit===-1&&num===1
       this.CartNumUpdate({value:{unit,goods_id}})
       }
    },
     handleAllCheck() {
      this.cartAllToggle({ value: this.isAllChecked });
    },
    handleGoPay(){
      // console.log(1);
      // 判断当前有没有选中商品
      if(this.totalCount === 0){
        uni.showToast({
          title:'您还没有选中商品',
          icon:'none'
        })
      }else{
        uni.navigateTo(
          {url:'/pages/pay/pay'}
        )
      }
    }
  }
}


</script>

<style lang="scss">
.cart {
  padding-bottom: 111rpx;
  .cart-list {
    .cart-item {
      display: flex;
      padding: 10rpx;
      border-bottom: 1rpx solid #ccc;
      .goods-chk {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .goods-img {
        flex: 2;

        display: flex;
        align-items: center;
        justify-content: center;
      }

      .goods-info {
        color: #666;
        flex: 3;
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        .goods-name {
        }

        .goods-price-num {
          display: flex;
          justify-content: space-between;
          .goods-price {
            color: $theme-color;
          }

          .goods-num-tool {
            width: 140rpx;
            height: 40rpx;

            display: flex;
            justify-content: space-between;
            .num-btn {
              border: 1rpx solid #ccc;
              border-radius: 50%;
              width: 40rpx;
              height: 40rpx;
              text-align: center;
              line-height: 40rpx;
            }
          }
        }
      }
    }
  }
  .statistics {
    position: fixed;
    background-color: #fff;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    border-top: 1rpx solid #ccc;
    display: flex;
    align-items: center;
    padding: 15rpx;
    .all-chk {
    }

    .all-price {
      flex: 1;
      color: #666;
      text {
      }
    }

    .all-count {
    }
  }
}
</style>